Federal direct subsidized loans are based on financial need. The federal government pays the interest during in-school, grace and deferment periods. Federal direct unsubsidized loans are not based on financial need, and the federal government does not pay the interest for these loans. Students may choose to defer interest payments until repayment begins; however, the student is responsible for all interest that accrues.
1 Outdoor air pollution can cause ongoing throat irritation. Indoor pollution â tobacco smoke or chemicals â also can cause a chronic sore throat. Chewing tobacco, drinking alcohol and eating spicy foods also can irritate your throat.  Muscle strain.
Difficulty chewing often results from changes to the mouth, jaw, or tongue. Cancer, especially oral and oropharyngeal cancers, may cause this. It may also occur after cancer treatment. These side effects of cancer treatment can cause chewing problems: Mucositis, which is soreness, pain, or inflammation in the mouth. Xerostomia, commonly called dry mouth. Radiation therapy, chemotherapy, and antidepressant or pain medications may cause this. Gum disease, tooth decay, or tooth loss.